Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Panasonic ZS3 and Leica V-Lux 40 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS3 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 229 g (0.50 lb / 8.08 oz) (including batteries). Leica V-Lux 40 has external dimensions of 105 x 59 x 28 mm (4.13 x 2.32 x 1.1″) and weighs 210 g (0.46 lb / 7.41 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS3 and Leica V-Lux 40. Leica V-Lux 40 is 1mm shorter and 5mm thinner than Panasonic ZS3 but it is also 2mm wider.
Comparison image of Panasonic ZS3 and Leica V-Lux 40 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Panasonic ZS3 and Leica V-Lux 40.
Comparison image of Panasonic ZS3 and Leica V-Lux 40 Size and Weight - Back View
Now lets look at the top view comparison of Panasonic ZS3 and Leica V-Lux 40.
Top View Comparison image of Panasonic ZS3 and Leica V-Lux 40 Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Leica V-Lux 40 is 19g lighter than the Panasonic ZS3 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither Panasonic Lumix DMC-ZS3 (Lumix DMC-TZ7) nor Leica V-Lux 40 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS3 and Leica V-Lux 40's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.